I wasn't referring specifically to holy- that is one of several points that were being discussed.
Nor do I agree that being an immobile turret is the "whole point" of being a caster, as you specifically noted SMN have been given more mobility. There is no ironclad rule that dictates for all casters exactly what degree of mobility in every game, just how much mobility , a "caster" should have. It likely depends upon how encounters and job/classes are designed together. If Square has changed direction over the years in encounter design then it wouldn't surprise me that job design also gets affected.